Acoustic apparatus.



E. RUBES. AGOUSTIG' APPARATUS. APPLIoATI'oN TILBD MAB. 5, 1912.

1,659,769.. Patented Apr. 22, 1913.

E. RUBES. ACOUSTIC APPARATUS. APPLIGATION FILED MAR.5, 1912.

1,059369. Patented Apr. 22, 191s. f

2 SHEETS-SHEET 2.

lia/62@ for l Losanna.'

sTATns ERNESTRUBES, OF BROOKLYN, NEW YORK.

AooUsTIc. APPARATUS. 1

al 'whom i may conce/rn Be it. known that I, ERNEST RUBEs, a citizen' of the United States, residing atBrook lyn, in the county of; Kings and State of New York, have invented 'new and useful Improvements in Acoustic Apparatus', of which'the following is a specification.

This invention' relates to acoustic apparatus andparticularly warning signals such as are'used on automobiles, motor boats and vthe -The primary object of the [invention is to render the main vibrating element or diaphragm more durable and at the same time insure proper vibration of thediaphragm. In warning signals or signaling devices of this class as now commonly 'employed ,-the main vibratingelement or diaphragm 1s d1- rectlyengaged and forcibly and rapidly displaced by the means for vibrating the same, and as a consequence such. diaphragm soon becomes ruptured and buckled. Thesediradvantages incidentto the commonlyemployed form of signal are due to the fact thatthe entire force utilized for vibrating the diaphragm is directly imposed on the effective face of the diaphragm.' Ihe structure embodying the features of the present invention overcomes these disadvantages by interposing yielding' means between the projection, vibrating member and the case.

The invention consists in the construction and arrangement of the several parts which will be more fully hereinafter described and claimed. In the drawing: Figure 1' is a sectional elevation of an acoustic apparatus or warnv'ing signal embodying the features of the invent-ion. Figf2 is a transverse vertical section on the line 2--2, Fig. 1. Fig. 3 is an enlarged detail sectional elevationshowing the manner of connecting the projection andk vibrating.Y member' by pivoted yielding means to the casing. Fig. 1 is a view simi-. lar to Fig. 1 showing'a modificatio-n.4 5 is a transverse section onthe line 5 5-, Fig. 4. Fig. 6 is an enlarged vdetail sectional elevation similarto 3 showing the modi-` tication. y

ments on the invention'sdisclosed by my apf plication Serial Nos. 630,598.. an'd'` 651,389, filed respectively J unefl, 1911;?,gii'and Septe'm' bei-26,1911. r

Referring'to Figs. 1, 2 and 3 of the drawing, the numerall 5 designates adiaphragm I, specification of Letters Patent.

Patented Apr. 22,1913.

pivotally'attached at their opposite ends, as

at 13 and 14, respectively to the said ledge or portions of the latter 'and to a diaphragm' vibrating auxiliary or a rearwardly extending projection 16. The arms 12, however, may be of any number, onlybeing necessary toA have the arms free for movement with the projection 16 through their pivotal connection to the latter and also yielding or resilient to relieve the diaphragm 5 of di- -rect pulling strain in a manner which will be more fully hereinafter speciiied. Be` tween the diaphragm 5 and the projection 16 is a washer 17 secured to the said disk Aand diaphragm by a screw or analogous' de vice 18. This washer 17 will be construct-ed Ofany suitable sound absorbing material. such ascork, and .thc object of the same is to prevent the transmission of harsh rattling-sounds or stridulations through the resonator 11 by the action of the vibrating device on the projection 16. The rear sec` tion 19 of the casing as shown is in the form of a cylindrical extension in which a suitable electric motor 20 is mounted and secured in any preferred manner, the said motor vhaving its armature shaft 21 projected for` wardly and provided with a rotary toothed continua-l contact with the projection 16.

In, Figs. 4, 5 and 6 practically the same features are embodied and. like reference characters are used toindicate similarv parts asin Figs. 1,'2and 3. The sound absorbing device or washer 17 is omitted in the modified, structure, the project-ion 16 in this instance being directly secured to the vibratj j. ling member or diaphragm. The present inventiongembodies.improve@ f In the operation of thev improved device it will be understood that the motor is supplied withelectric current from a suitable rotary` action of the disk 22, and the teeth of the latter being in Contact with the proyielding arms 12 with the projection 16, latphragm being accomplished through the projection 16 and washer 17. This operation of the diaphragm will generate alarm notes or sounds, and owing to the presence and association of themovably mounted eral pulling strain will be prevented from being imposeddirectly on the diaphragm. 'Ihe arms 12 coact or harmonize with the vibrations of the diaphragm With material vadvantage in the sound emitted by the reso# nator, and the Wear and tear-of the sound producing parts of the apparatus are reduced to a minimum, and rupture and bnc` 'kling of the diaphragm are prevented. By

the interposition of the sound absorbing means or Washer 17 between the diaphragm 5 and the projection V16, harsh metallic rattling sounds or stridulations Will be eliminated and the tone of ,the sounds or signal given forth by the apparatus will be soft and pleasing to the ear, but at the same time sufficiently `distinct to be effective as an alarm.

The interposit-ion of the pivoted arms 12 between the projection 16 and the casing irrespective of the sound absorbing Washer 17 is the all important feature of the invention, and when the several parts including the vibrating member orrdiaphragm 'are 'connected up or operatively associated, the

projection is reinforced against breakage and a yielding movement ensues which relieves the projectionof undue strain as the diaphragm, projection and arms move uniformly when subjected to vibrating stress and shocks and injurious pulsations are taken up by the arms. The projection is practically pivoted to the casing and con nected to the diaphragm in both forms and all the parts move together and the arms' counteract to prevent injury to the diaphragm and projection by the action of the rotary disk 22..

The Vseveral parts of the apparatus are simple in their construction and may be readily associated, and changes in the proportions, dimensions and minor details may be adopted without departing from the spirit of the invention.

IVhat is claimed is:

1. In an acoustic apparatus of the class specified, an inclosing casing, a resonator secured thereto, a diaphragm mounted in the casing, a projection secured to and extending inwardly from the diaphragm, a plurality of resilient arms extending radially with relation to the diaphragm and pivoted at theirouter and inner ends respectively to the casing and to the projection7 the arms acting as a protective means for the diaphragm in different directions to relieve the diaphragm of injurious strain and to reinforce the projection in opposite directions against breakage, and means engaging the projection to set up a vibration of the diaphragm.'

2. In an acoustic apparatus, an inclosing casing, a diaphragm mounted inthe casing, a projection secured to the diaphragm, a plurality of resilient arms extending radially over the diaphragm and pivoted to the casing and to the projection,A and means engaging the projection to set up a vibratio;

lof the diaphragm.

3. In an acoustic apparatus of the class specified, an inclosing casing, a resonator secured thereto. a diaphragm mounted in the casing, a resilient means pivotally securedto the casing, a projection attached to the resilient means for vibrating the diaphragm, a sound absorbing means interposed between the diaphragm and the projection and secured to the projection, and means engaging the projection to set up a vibration of the diaphragm.

4. In an acoustic apparatus of the class specified, an inclosing casing, a resonator secured thereto, a disk carrying a projection, resilient arms pivotally connected to the disk and the casing, a sound absorbing means interposed between the diaphragm and the disk and secured to the latter, and rotary means directly engaging the projection of the disk to set up a vibration of the diaphragm.

5. In an acoustic apparatus of the classposed between the disk anddiaphragm, and

means directly engaging the projection on the disk for causing a rapid'displacement or vibration of the diaphragm.

In testimony whereof I have hereunto set my hand in presence of two subscribing witmesses.

, ERNEST RUBES. Witnesses:

ISAAC BROWN, JOHN F. CLEVELAND;

Gcpies of this patent may be obtained for ve cents each, byaddressing the Commissioner of Yatent, Washington, I). C. 

